92548 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 43% of adults in 92548 typically vote, below the U.S. average of about 62%. Among adults in 92548, ~18% vote Democratic, ~25% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 92548 compares
Among zip codes within 15 miles, 92548 leans more Republican than 17 of 21 neighbors.
92548 runs about 38 points more Republican than California as a whole. California leans Democratic overall, while 92548 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 92548. The northeast side is the most Republican-leaning (R+33) and the west side is the least Republican-leaning (R+12), a spread of about 20 points.
Why 92548 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 92548, not a ranked or complete list of what matters most.
92548 votes against the grain of California. California leans Democratic overall, while 92548 runs about 38 points more Republican. Low college attainment predicts Republican voting, and 92548 sits in the bottom quarter (about 8%, below 97% of zip codes).
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 92548, CA does.
Why turnout in 92548 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 92548 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 29% of adults in 92548 report food insecurity, above 93% of zip codes. Low high-school completion lines up with lower turnout, and about 73% of adults in 92548 have completed high school, below 96% of zip codes. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.